GrimmSpeed Phenolic Thermal Spacer 3mm - 2015-2021 Subaru STI / 2002-2014 Impreza / 2004-2009 Legacy GT / 2004-2013 Forester XT

Elevate Your Engine's Performance with GrimmSpeed's Phenolic Intake Manifold/TGV to Engine Thermal Spacer

Ever wondered what your intake manifold sits on? Hint: It's a superheated boxer engine. The secret to unlocking more horsepower lies in the temperature of your intake air. GrimmSpeed introduces the solution to this age-old challenge – the Phenolic Intake Manifold/TGV to Engine Thermal Spacer.

While phenolic spacers have been utilized by specialized automotive companies for years, this technology is breaking new ground in the Subaru world.

Key Advantages:

1. Reduced Heat Transfer: Significantly diminishes the transfer of heat from the engine to the intake manifold, combating heat soak.
2. Premium Phenolic Material: A unique and authentic phenolic material, distinct from common cutting board materials used by others.
3. Enhanced Air Density: Cooler intake temperatures result in denser air, translating to increased power.
4. Power Boost: For every 5-degree reduction in air temperature, experience a 1% increase in power.
5. Improved Efficiency: Cooler and denser intake air allows for a greater air-to-fuel ratio, optimizing combustion efficiency.

Upgrade your Subaru with GrimmSpeed's innovative Phenolic Intake Manifold/TGV to Engine Thermal Spacer, and feel the difference in power, efficiency, and overall engine performance.

• Effortless Installation: Direct Bolt-On Solution

  Experience the ease of a direct bolt-on solution. When utilizing only a gasket, your intake manifold can become scorching to the touch, posing a risk of burns. GrimmSpeed revolutionizes this scenario with our gaskets, particularly when paired with our Phenolic Spacers – allowing you to comfortably place your hand on the intake manifold.

  For optimal performance, we recommend using two sets of our gaskets, securing them on both sides of the spacers. Rest assured, our products are proudly made in the USA.

  How It Operates: The journey of intake air in your engine unfolds as it travels from the airbox into the turbo, proceeding into the aluminum intake manifold. From there, the air exits the intake manifold and directly enters the engine. Upgrade your setup effortlessly with GrimmSpeed, ensuring a cooler touch on your intake manifold and a smoother installation experience.

• Enhance Performance by Managing Intake Heat: GrimmSpeed Phenolic Spacer

  As intake air resides within the intake manifold, it absorbs significant heat from the aluminum structure. This elevated temperature diminishes air density, consequently reducing the engine's power capabilities. In the factory setup, a steel gasket separates the intake manifold and engine, enabling swift heat transfer from the engine to the manifold.

  Enter the GrimmSpeed Phenolic Spacer and gaskets – a transformative solution. By replacing the stock steel gasket with our advanced Phenolic Spacer, the transfer of engine heat into the intake manifold is significantly curtailed. Phenolic Spacers boast a remarkable tolerance of 500+ degrees F, well-suited for Subaru engines operating at around 200 degrees F. Our extensive testing has confirmed the safety of using race fuel, E85, and methanol with the Phenolic Spacers.

  Remarkably, the Phenolic Spacer conducts 300-900 times less heat than the OEM steel gasket, offering a tangible improvement in managing intake temperatures and optimizing engine performance. Upgrade your Subaru with GrimmSpeed's Phenolic Spacer for a cooler and more efficient engine experience.

Temperature Testing Data: Testing at 1/2 hour intervals. All testing was conducted fairly in Fahrenheit measurements on ONE day at a consistent outside temperature.

Test #1 - OEM measurement from IM without spacers, 152 degrees.

Test #2 - with 3mm phenolic spacers the temp dropped to 134 Degrees

Test #3 - With 8mm phenolic spacers the temp dropped to an outstanding 108 Degrees!!!

That is an OVER 44 Degree drop with the largest Phenolic Spacers!

Applications:
WRX '02-'14
STI '02-'21
Legacy GT 04-'09
Forester XT '04-'13